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moto/tests/test_iot/test_iot_policies.py

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import boto3
import json
import pytest
from botocore.exceptions import ClientError
from moto import mock_iot, mock_cognitoidentity
@pytest.fixture
def region_name():
return "ap-northeast-1"
@pytest.fixture
def iot_client(region_name):
with mock_iot():
yield boto3.client("iot", region_name=region_name)
@pytest.fixture
def policy(iot_client):
return iot_client.create_policy(policyName="my-policy", policyDocument="{}")
def test_attach_policy(iot_client, policy):
policy_name = policy["policyName"]
cert = iot_client.create_keys_and_certificate(setAsActive=True)
cert_arn = cert["certificateArn"]
iot_client.attach_policy(policyName=policy_name, target=cert_arn)
res = iot_client.list_attached_policies(target=cert_arn)
res.should.have.key("policies").which.should.have.length_of(1)
res["policies"][0]["policyName"].should.equal("my-policy")
@mock_cognitoidentity
def test_attach_policy_to_identity(region_name, iot_client, policy):
cognito_identity_client = boto3.client("cognito-identity", region_name=region_name)
identity_pool_name = "test_identity_pool"
identity_pool = cognito_identity_client.create_identity_pool(
IdentityPoolName=identity_pool_name, AllowUnauthenticatedIdentities=True
)
identity = cognito_identity_client.get_id(
AccountId="test", IdentityPoolId=identity_pool["IdentityPoolId"]
)
client = iot_client
policy_name = policy["policyName"]
client.attach_policy(policyName=policy_name, target=identity["IdentityId"])
res = client.list_attached_policies(target=identity["IdentityId"])
res.should.have.key("policies").which.should.have.length_of(1)
res["policies"][0]["policyName"].should.equal(policy_name)
def test_detach_policy(iot_client, policy):
cert = iot_client.create_keys_and_certificate(setAsActive=True)
cert_arn = cert["certificateArn"]
policy_name = policy["policyName"]
iot_client.attach_policy(policyName=policy_name, target=cert_arn)
res = iot_client.list_attached_policies(target=cert_arn)
res.should.have.key("policies").which.should.have.length_of(1)
res["policies"][0]["policyName"].should.equal(policy_name)
iot_client.detach_policy(policyName=policy_name, target=cert_arn)
res = iot_client.list_attached_policies(target=cert_arn)
res.should.have.key("policies").which.should.be.empty
def test_list_attached_policies(iot_client):
cert = iot_client.create_keys_and_certificate(setAsActive=True)
policies = iot_client.list_attached_policies(target=cert["certificateArn"])
policies["policies"].should.equal([])
def test_policy_versions(iot_client):
policy_name = "my-policy"
doc = "{}"
policy = iot_client.create_policy(policyName=policy_name, policyDocument=doc)
policy.should.have.key("policyName").which.should.equal(policy_name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(json.dumps({}))
policy.should.have.key("policyVersionId").which.should.equal("1")
policy = iot_client.get_policy(policyName=policy_name)
policy.should.have.key("policyName").which.should.equal(policy_name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(json.dumps({}))
policy.should.have.key("defaultVersionId").which.should.equal(
policy["defaultVersionId"]
)
policy1 = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_1"}),
setAsDefault=True,
)
policy1.should.have.key("policyArn").which.should_not.be.none
policy1.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_1"})
)
policy1.should.have.key("policyVersionId").which.should.equal("2")
policy1.should.have.key("isDefaultVersion").which.should.equal(True)
policy2 = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_2"}),
setAsDefault=False,
)
policy2.should.have.key("policyArn").which.should_not.be.none
policy2.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_2"})
)
policy2.should.have.key("policyVersionId").which.should.equal("3")
policy2.should.have.key("isDefaultVersion").which.should.equal(False)
policy = iot_client.get_policy(policyName=policy_name)
policy.should.have.key("policyName").which.should.equal(policy_name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_1"})
)
policy.should.have.key("defaultVersionId").which.should.equal(
policy1["policyVersionId"]
)
policy3 = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_3"}),
setAsDefault=False,
)
policy3.should.have.key("policyArn").which.should_not.be.none
policy3.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_3"})
)
policy3.should.have.key("policyVersionId").which.should.equal("4")
policy3.should.have.key("isDefaultVersion").which.should.equal(False)
policy4 = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_4"}),
setAsDefault=False,
)
policy4.should.have.key("policyArn").which.should_not.be.none
policy4.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_4"})
)
policy4.should.have.key("policyVersionId").which.should.equal("5")
policy4.should.have.key("isDefaultVersion").which.should.equal(False)
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(5)
list(
map(lambda item: item["isDefaultVersion"], policy_versions["policyVersions"])
).count(True).should.equal(1)
default_policy = list(
filter(lambda item: item["isDefaultVersion"], policy_versions["policyVersions"])
)
default_policy[0].should.have.key("versionId").should.equal(
policy1["policyVersionId"]
)
policy = iot_client.get_policy(policyName=policy_name)
policy.should.have.key("policyName").which.should.equal(policy_name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_1"})
)
policy.should.have.key("defaultVersionId").which.should.equal(
policy1["policyVersionId"]
)
iot_client.set_default_policy_version(
policyName=policy_name, policyVersionId=policy4["policyVersionId"]
)
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(5)
list(
map(lambda item: item["isDefaultVersion"], policy_versions["policyVersions"])
).count(True).should.equal(1)
default_policy = list(
filter(lambda item: item["isDefaultVersion"], policy_versions["policyVersions"])
)
default_policy[0].should.have.key("versionId").should.equal(
policy4["policyVersionId"]
)
policy = iot_client.get_policy(policyName=policy_name)
policy.should.have.key("policyName").which.should.equal(policy_name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(
json.dumps({"version": "version_4"})
)
policy.should.have.key("defaultVersionId").which.should.equal(
policy4["policyVersionId"]
)
with pytest.raises(ClientError) as exc:
iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_5"}),
setAsDefault=False,
)
err = exc.value.response["Error"]
err["Message"].should.equal(
"The policy %s already has the maximum number of versions (5)" % policy_name
)
iot_client.delete_policy_version(policyName=policy_name, policyVersionId="1")
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(4)
iot_client.delete_policy_version(
policyName=policy_name, policyVersionId=policy1["policyVersionId"]
)
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(3)
iot_client.delete_policy_version(
policyName=policy_name, policyVersionId=policy2["policyVersionId"]
)
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(2)
iot_client.delete_policy_version(
policyName=policy_name, policyVersionId=policy3["policyVersionId"]
)
policy_versions = iot_client.list_policy_versions(policyName=policy_name)
policy_versions.should.have.key("policyVersions").which.should.have.length_of(1)
# should fail as it"s the default policy. Should use delete_policy instead
with pytest.raises(ClientError) as exc:
iot_client.delete_policy_version(
policyName=policy_name, policyVersionId=policy4["policyVersionId"]
)
err = exc.value.response["Error"]
err["Message"].should.equal("Cannot delete the default version of a policy")
def test_policy_versions_increment_beyond_5(iot_client, policy):
"""
Version ids increment by one each time.
Previously there was a bug where the version id was not incremented beyond 5.
This prevents a regression.
"""
policy_name = policy["policyName"]
for v in range(2, 11):
new_version = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": f"version_{v}"}),
setAsDefault=True,
)
new_version.should.have.key("policyVersionId").which.should.equal(str(v))
iot_client.delete_policy_version(
policyName=policy_name, policyVersionId=str(v - 1)
)
def test_policy_versions_increment_even_after_version_delete(iot_client, policy):
"""Version ids increment even if the max version was deleted."""
policy_name = policy["policyName"]
new_version = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_2"}),
)
new_version.should.have.key("policyVersionId").which.should.equal("2")
iot_client.delete_policy_version(policyName=policy_name, policyVersionId="2")
third_version = iot_client.create_policy_version(
policyName=policy_name,
policyDocument=json.dumps({"version": "version_3"}),
)
third_version.should.have.key("policyVersionId").which.should.equal("3")
def test_delete_policy_validation(iot_client):
doc = """{
"Version": "2012-10-17",
"Statement":[
{
"Effect":"Allow",
"Action":[
"iot: *"
],
"Resource":"*"
}
]
}
"""
cert = iot_client.create_keys_and_certificate(setAsActive=True)
cert_arn = cert["certificateArn"]
policy_name = "my-policy"
iot_client.create_policy(policyName=policy_name, policyDocument=doc)
iot_client.attach_principal_policy(policyName=policy_name, principal=cert_arn)
with pytest.raises(ClientError) as e:
iot_client.delete_policy(policyName=policy_name)
e.value.response["Error"]["Message"].should.contain(
"The policy cannot be deleted as the policy is attached to one or more principals (name=%s)"
% policy_name
)
res = iot_client.list_policies()
res.should.have.key("policies").which.should.have.length_of(1)
iot_client.detach_principal_policy(policyName=policy_name, principal=cert_arn)
iot_client.delete_policy(policyName=policy_name)
res = iot_client.list_policies()
res.should.have.key("policies").which.should.have.length_of(0)
def test_policy(iot_client):
name = "my-policy"
doc = "{}"
policy = iot_client.create_policy(policyName=name, policyDocument=doc)
policy.should.have.key("policyName").which.should.equal(name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(doc)
policy.should.have.key("policyVersionId").which.should.equal("1")
policy = iot_client.get_policy(policyName=name)
policy.should.have.key("policyName").which.should.equal(name)
policy.should.have.key("policyArn").which.should_not.be.none
policy.should.have.key("policyDocument").which.should.equal(doc)
policy.should.have.key("defaultVersionId").which.should.equal("1")
res = iot_client.list_policies()
res.should.have.key("policies").which.should.have.length_of(1)
for policy in res["policies"]:
policy.should.have.key("policyName").which.should_not.be.none
policy.should.have.key("policyArn").which.should_not.be.none
iot_client.delete_policy(policyName=name)
res = iot_client.list_policies()
res.should.have.key("policies").which.should.have.length_of(0)
def test_attach_policy_to_thing_group(iot_client, policy):
thing_group = iot_client.create_thing_group(thingGroupName="my-thing-group")
thing_group_arn = thing_group["thingGroupArn"]
policy_name = policy["policyName"]
iot_client.attach_policy(policyName=policy_name, target=thing_group_arn)
res = iot_client.list_attached_policies(target=thing_group_arn)
res.should.have.key("policies").which.should.have.length_of(1)
res["policies"][0]["policyName"].should.equal(policy_name)
def test_attach_policy_to_non_existant_thing_group_raises_ResourceNotFoundException(
iot_client, policy
):
thing_group_arn = (
"arn:aws:iot:ap-northeast-1:123456789012:thinggroup/my-thing-group"
)
policy_name = policy["policyName"]
with pytest.raises(ClientError, match=thing_group_arn):
iot_client.attach_policy(policyName=policy_name, target=thing_group_arn)
def test_policy_delete_fails_when_versions_exist(iot_client, policy):
policy_name = policy["policyName"]
iot_client.create_policy_version(
policyName=policy_name,
policyDocument=policy["policyDocument"],
setAsDefault=True,
)
with pytest.raises(ClientError) as e:
iot_client.delete_policy(policyName=policy_name)
e.value.response["Error"]["Message"].should.contain(
"Cannot delete the policy because it has one or more policy versions attached to it"
)
def test_list_targets_for_policy_empty(iot_client, policy):
res = iot_client.list_targets_for_policy(policyName=policy["policyName"])
res.should.have.key("targets").which.should.have.length_of(0)
def test_list_targets_for_policy_one_attached_thing_group(iot_client, policy):
thing_group = iot_client.create_thing_group(thingGroupName="my-thing-group")
thing_group_arn = thing_group["thingGroupArn"]
policy_name = policy["policyName"]
iot_client.attach_policy(policyName=policy_name, target=thing_group_arn)
res = iot_client.list_targets_for_policy(policyName=policy["policyName"])
res.should.have.key("targets").which.should.have.length_of(1)
res["targets"][0].should.equal(thing_group_arn)
def test_list_targets_for_policy_one_attached_certificate(iot_client, policy):
cert = iot_client.create_keys_and_certificate(setAsActive=True)
cert_arn = cert["certificateArn"]
policy_name = policy["policyName"]
iot_client.attach_policy(policyName=policy_name, target=cert_arn)
res = iot_client.list_targets_for_policy(policyName=policy["policyName"])
res.should.have.key("targets").which.should.have.length_of(1)
res["targets"][0].should.equal(cert_arn)
def test_list_targets_for_policy_resource_not_found(iot_client):
with pytest.raises(ClientError) as e:
iot_client.list_targets_for_policy(policyName="NON_EXISTENT_POLICY_NAME")
e.value.response["Error"]["Code"].should.equal("ResourceNotFoundException")
e.value.response["Error"]["Message"].should.contain("Policy not found")
def test_create_policy_fails_when_name_taken(iot_client, policy):
policy_name = policy["policyName"]
with pytest.raises(ClientError) as e:
iot_client.create_policy(
policyName=policy_name,
policyDocument='{"Version": "2012-10-17", "Statement": [{"Effect": "Allow", "Action": "*", "Resource": "*"}]}',
)
current_policy = iot_client.get_policy(policyName=policy_name)
e.value.response["Error"]["Code"].should.equal("ResourceAlreadyExistsException")
e.value.response["Error"]["Message"].should.equal(
f"Policy cannot be created - name already exists (name={policy_name})"
)
# the policy should not have been overwritten
current_policy.should.have.key("policyDocument").which.should.equal(
policy["policyDocument"]
)
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